ACTINOGONIDIATE ECHINODERMS. 227 



Ophidiaster cylindricus, M. Tr. Syst. Aster. (1842), p. 29. 



A regular denizen of the boulder zone of every reef visited in the Maldives, also at 

 Minikoi. See Dr Mac Munn's Note on the pigment of this species, pp. 189 — 90, Vol. i. Part ii. 

 of this publication. 



VII. Genus Retaster. 



The genus was represented by a few immature forms from Mahlos, 23/., and Mulaku, 30/, 

 sand and rubble. 



VIII. Genus Mithrodia. 



17. Mithrodia clavigera. 



Asterias clavigera, Lamk. Anim. s. Vert. ii. (1816), p. 562. 

 Mithrodia clavigera, Perr. Arch. Zool. exper. iv. (1875), p. 378. 

 Suvadiva, 30/., across the inner end of a passage, hard bottom. 



IX. Genus Fromia. 



18. Fromia milleporella. 



Asterias inilleporella, Lamk. Anim. s. Vert. ii. (1816), p. 564. 



Fromia inilleporella, Perr. Ai-ch. Zool. exper. iv. (1875), p. 437. 



A single specimen found under the overhanging side of a growing coral near the edge 

 of the east reef of Naifaro, Fadifolu. 



X. Genus Asterina. 



19. Asterina cepheiis^. 



Asteriscus cepheus, M. Tr. Syst. Aster. (1842), p. 41. 



Asterina cephea. Pen-. Arch. Zool. exper. v. (1876), p. 235. 



Fadifolu, 15 /, from a passage covered with coral growth, and from the outer reef off 

 Maradu, Addu. Immature forms are common on the Maldive reefs, but only the single above- 

 mentioned adult was obtained. The 3'oung cling to the rock of the reef-flat or boulder zone, 

 and do not seek cover in the daytime as do most species. 



XI. Genus Pentagonaster. 



Two immature forms were dredged from 35/, Kolumadulu, dead, and broken shells. 



XII. Genus Stellaster. 



Young specimens from 30/, S. Nilandu, hard sand, corals and sponges, and 40/, Mulaku, 

 weed, sand and rubble. 



20. Stellaster incei. 



Stellaster incei. Gray, P7-oc. Zool. Sac. Lond. 1847, p. 76. 

 Pentagonaster {Stellaster) incei, Perr. op. cit. V. p. 43. 

 Dredged three times in different atolls, 23 — 30/, sand and rock. 

 ^ Some writers say cephea, but, as any astronomer will tell them, cepheus is a star, and was the name of a Greek king. 



